Biosynthesis of monoterpene scent compounds in roses
2015
Magnard, Jean-Louis | Roccia, Aymeric | Caissard, Jean-Claude | Vergne, Philippe | Sun, Pulu | Hecquet, Romain | Dubois, Annick | Hibrand-Saint Oyant, Laurence | Jullien, Frederic | Nicolè, Florence | Raymond, Olivier | Huguet, Stephanie | Baltenweck-Guyot, Raymonde | Meyer, Sophie | Claudel, Patricia | Jeauffre, Julien | Rohmer, Michel | Foucher, Fabrice | Hugueney, Philippe | Bendahmane, Mohammed | Baudino, Sylvie
The scent of roses (Rosa x hybrida) is composed of hundreds of volatile molecules.Monoterpenes represent up to 70% percent of the scent content in some cultivars, such asthe Papa Meilland rose. Monoterpene biosynthesis in plants relies on plastid-localizedterpene synthases. Combining transcriptomic and genetic approaches, we show thatthe Nudix hydrolase RhNUDX1, localized in the cytoplasm, is part of a pathway for thebiosynthesis of free monoterpene alcohols that contribute to fragrance in roses. TheRhNUDX1 protein shows geranyl diphosphate diphosphohydrolase activity in vitro andsupports geraniol biosynthesis in planta.
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